1221445200212 has 24 divisors (see below), whose sum is σ = 2162053555200. Its totient is φ = 603741141216.

The previous prime is 1221445200191. The next prime is 1221445200301. The reversal of 1221445200212 is 2120025441221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2999348 + ... + 3382155.

It is an arithmetic number, because the mean of its divisors is an integer number (90085564800).

Almost surely, 2^{1221445200212} is an apocalyptic number.

It is an amenable number.

1221445200212 is a deficient number, since it is larger than the sum of its proper divisors (940608354988).

1221445200212 is a wasteful number, since it uses less digits than its factorization.

1221445200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382055 (or 6382053 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The spelling of 1221445200212 in words is "one trillion, two hundred twenty-one billion, four hundred forty-five million, two hundred thousand, two hundred twelve".